Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cac luc » cau luc, coc luc, cac nuoc
ve cac » va cac, vien cac
ve ve » de ve, va ve, ve ke
ke ve » ke va, ke he, de ve

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) lang xa hoi. hieu ve cac luc van hanh ((ve ve) or (ke ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu ve cac luc van hanh ((ve ve) OR (ke ve)) triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. hieu ve cac luc van hanh ((ve ve) or (ke ve)) triet*.